George d



G. D. EMERSON. 11111011011 CLUTCH PoR BNGAGING 111111 DISBNGAGING GEARING.'

110.101,846l f Patented Apr;12,1a'7o.

. il'om the side of the inited` states @stent dtj'iiiw.

encuen o. nMERsoN, oFcALjUMnT, MIcHIG-ANL Lmes .Patent No. 101.846,0zm1 1mi 12, 1870; meamuprn 4,1870.

I'RICTION-CLUTCH POR ENG-AGING- AND DISENGA'G-ING- GEARING.

The Schedule referred to in these Lettexsatent: and making part of the same.

To all whom. it ma'y concernf Beit known that LGEORGE D. EMsnsoN, of Calumet, in the county of Houghton and State of Michian, have invented a new and improved Friction-Clutch ior Engaging and Disengaging Gearing, of which the following is a true description, reference being had to thc accompanying drawin gs.

Figure l is a side view ot' a device applied thereto.

Figure 2,' a vertical cross-section of the saine.

Like letters of reference i ndicatc corresponding parts in allofthe giu'es.

My invention consistsl in the improved device herein described for producing the adjustment of the segment bearings, so that they may form a rigid connection with the pulley or gear wheel, or be disconnected therefrom at pleasure, for the purpose of engaging or disengaging the gearing of the machinery.

In the annexed drawings- A indicates a loose pulley supported upon the` shaft b.

The pulley A is made of the cup-form shown, having a projecting flange, a, that encases the interior mechanism.

Upon the shaft b is rigidly secured a. hub, c, which is provided with radially-projecting arms, d d, which support loosely the adjustable segments B B in ways or slots' formed in the ixnvardly-proiecting bearings e c of the latter.

These segments arc placed in close proximity with the flange c of the 4loose pulley, and. are adjusted out and in to forni a rigidconnection with the pulley, or to be disconnected therefrom by means of the togglelevers D D, shown in figs. l and 2.

rlhese toggle-levers are jointed to brackets y g of pulley-wheel with my the segments,situated on opposite sides of the pulley- `wheel, and are formed with forked or branched arms, h, h, which encircle the shaft l) and hub 0and are jointed to each other at 'i 'z'.

At the joints i -z'v are also pivoted links or bars 7c k, which connect the. levers with the sliding collar F, whereby the reciprocating movements are converted into the lateral, expanding, and contracting movements of the segments. lhe levers being jointed to each other, and not to the hub or collar,-act reciprocally pulley and entirely free of the shaft' 1t will bc secu that hy simply adjusting the sliding collar F backward, the haggle-levers 1) D will necessarily be drawn out at nu angle, and vthereby the segmeut bearings he withdrawn from contact with the flange of the loose pulley A, as shown in red lines in iig. 2. v

By this construction, of the device for adjusting the Segments, a more even and uniform pressure is obtained, andmuch less 'power is required thanin otherdevices for the purpose.

I face these segments by inserting, in one oi` more dovctail recesses, blocks of wood, o o, whichI is better adapted for adhesion than it' both surfaces were of metal, whereby the engagement is produced with less expenditure of power, and less strain from sudden stoppage of motion.

I prefer to employ'an elastic packing or disk, s, of rubber or other suitable material, interposed between the bracket-s g r/ and segments B, so as to allow a. degree of elasticity to the segments to enable them to adapt themselves to the surface of the flange a, so as to secure an even bearing should there exist any incquality between the two friction-surfaces.

The special advantage of the interposed cushion s is, that it, enables the segments, when brought in oo ntact with the flange ofthe pulley, to adapt themselves, in a. measure, by the yielding ot' the cushion, tothe irregularity between the two ii'ictiomsurfaces, so that` the adhesion may become quickly effective and prevent the shock of too suddenly overcoming the inertia of the non-revolving body.

The device is extremely simple, and hence the more durable and less liable to get out of order, while it is very effectual in its operation. lixis is due, in part, t-o the simple arrangement of the dual elbow-levers, jointed together to act independently of the sliding sleeve F, by which its motion is converted into a iaterally expansive movement of the friction-segments, and the friction is communicated by their direct contact with the pulley to be engaged.' This direct :tc-

tion, wit-hout the aid o r intcrpostion of other pnrts,.

produces another special advantage, in that, if one segment comes in contact with the iiange a before the other, the bearing t-hus obtained reacts dircctl y against the opposite side, through the expansive movement of the other segment.

What I claim as my invention, and desire to secure by Letters Patent, is A l. The'combination, with the segments B fsliding in the same line toward and from each other on arms d ll, of thetoggle-levcrs D D, jointed to said segments and operating together, substantially as described.

2; In combination with the expanding segments B B and toggle-levels l) D, the elastic disks s s, for the purpose set forth.

i5. The segments .B B, in combination with the wooden facings o o, operating substantially as set forth and described.

GEO. D. EMERSON. Witnesses:

KATE N. J onus, J. FRAsnn. 

